(KPNX) Police in Phoenix, Arizona are investigating how and why five people ended up dead inside a home.

Police Sgt. Trent Crump said all the victims appear to be related.

Crump said it began around 2 p.m. Thursday when authorities got a call from a woman in her 30s who had apparently just fled a home where shots were being fired. Crump said the woman had a 3-year-old and a child younger than a year old with her.

“We do know we have a female… fleeing the house while shots are being fired and on the phone with 911 and taking two small kids with her… At least at this point, sounds very heroic,” Crump said.